Ultrafiltration is a membrane process with the ability to separate molecules in solution on the basis of particle size. Ultrafiltration is typically rated by molecular weight cutoff. Ultra filtration can also be applied for pre-treatment of water for nano filtration or Reverse Osmosis. The pores of ultra filtration membranes can remove particles of 0.01 – 0.1 µm from fluids. Ultrafiltration (UF) membranes are able to separate colloids, suspended solids, emulsions, metal hydroxides, bacteria, viruses, emulsified oils, dispersed material and other large molecular weight materials from water and other solutions.